I know that not everyone will have the patience, but I really, really recommend to watch the whole thing. It is not just about programming or game design, but about being creative using the computer in a way that feels much more natural than current usage.
Those of you who don't want to watch the whole thing, watch at least the first 23 Minutes and from 29:20 to 34:00. I promise it will feel like seconds.
Now that you have watched it, let me tell you that it already influenced some game creators. For example, this one.
I'm really excited, as you can tell.